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Buddy Tennison (Buddyten)
Registered Member
Username: Buddyten

Post Number: 50
Registered: 7-2005
Posted From: 207.68.234.24

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Votes: 0 (Vote!)

Posted on Tuesday, January 01, 2008 - 10:57 am:   

Hey Guys:
Wishing all a Happy New Year!!

We had a little problem this weekend that I trust you all can help with. Located underneath the cockpit and the electrical panel on our 83 Eagle is a unit that for lack of a better terminology I would call an air manifold. It also had a couple of "pop off" thingys on it. Two or three times this weekend, when we started the bus, and letting the air build, we would get an air leak around these "pop off" seals that would not let the air pressure build past 100. We have manual drains on the air tanks, and when we would drain it a couple of times, and let it rebuild, it eventually would let the air build. Also, you can apply pressure with your finger to these "seals or pop offs" and if you could hold it long enough, it would click and the air would continue to build.

1. What is this thing?
2. What could be causing the problem?
3. Is this a common part that can be purchased at a truck parts dealer, or is this unique to a bus?
4. Is it rebuildable or a problem that can be easily corrected?
5. If it does need replacement, can any of you tell me the part # or nomeclature of this unit?

Any help you can give would be most appreciated.
larry currier (Larryc)
Registered Member
Username: Larryc

Post Number: 155
Registered: 2-2007
Posted From: 207.200.116.13

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Posted on Tuesday, January 01, 2008 - 6:45 pm:   

Buddy, My 89 has a similar manifold that is marked park/stop and service interlock on it.

I hate to guess but since its leaking in more than one place it points to another valve somewhere sticking.

The manifold where you have the loss of air is probably doing its job. May not seat without balance?

You didn't say how cold it is and I have crossed more than one State with the front brakes frozen and loosing air before thawing.

The first thing that I would do is stop at a truck stop and get some air brake antifreeze. I would pour a quart or so in my wet tank and drive it for about 3 days @ 8 hr a day and drain the front tanks every day to pull the alcohol foreward. Use all the air operated devices on your coach extensively to work the alcohol thru everything. Air valves love alcohol.

Both of my Eagles have the wet tank mounted above the left drive tires.

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